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A53 Pipe Specifications

A/SA53

NPS 1/8″ – 26″

Schedules 10 through 160, STD, XH and XXH

ASTM A53 pipe (also referred to as ASME SA53 pipe) is intended for mechanical and pressure applications and is also acceptable for ordinary uses in steam, water, gas and air lines. It is suitable for welding and for forming operations involving coiling, bending, and flanging, subject to certain qualifications.

American Piping Products stocks a full range of A53 pipe (SA53 Pipe) in:

Grade B

NPS 1/8” to 26” diameter

Schedules 10 through 160, STD, XH and XXH

Scope

ASTM A53 pipe covers Seamless and Welded, Black and Hot-Dipped Galvanized nominal (average) wall pipe for coiling, bending, flanging and other special purposes and is suitable for welding. Continuous-Welded pipe is not intended for flanging. Purpose for which pipe is intended should be stated on order.

Materials and Manufacture

The steel for both seamless and welded pipe shall be made by one or more of the following processes: open-hearth, electric furnace, or basic-oxygen. The weld seam of electric-resistance welded pipe in Grade B shall be heat treated after welding.

Chemical Requirements

Download Chart

Type S (seamless)

Type E

Type F

(electric- resistance welded)

(furnace- welded pipe)

Grade A

Grade B

Grade A

Grade B

Grade A

Carbon max. %

0.25

0.30*

0.25

0.30*

0.3

Manganese %

0.95

1.2

0.95

1.2

1.2

Phosphorous, max. %

0.05

0.05

0.05

0.05

0.05

Sulfur, max. %

0.045

0.045

0.045

0.045

0.045

Copper, max.%

0.40

0.40

0.40

0.40

0.4

Nickel, max. %

0.40

0.40

0.40

0.40

0.4

Chromium, max. %

0.40

0.40

0.40

0.40

0.4

Molybdenum, max. %

0.15

0.15

0.15

0.15

0.15

Vanadium, max. %

0.08

0.08

0.08

0.08

0.08

*For each reduction below 0.01% below the specified carbon maximum, an increase of 0.06% manganese above the specified maximum will be permitted up to a maximum of 1.65% (does not apply to SA53).

Permissible Variations in Wall Thickness

The minimum wall thickness at any point shall not be more than 12.5% under the nominal wall thickness specified.

Permissible Variations in Weights per Foot

Plus or minus 10%

Permissible Variations in Outside Diameter

Outside Diameter at any point shall not vary from standard specified more than:

Tensile Requirements

Seamless and Electric-resistance-welded

Continuous-Welded

Grade A

Grade B

Tensile Strength, min., psi

48,000

60,000

45,000

Yield Strength, min., psi

30,000

35,000

25,000

Hydrostatic Testing

Hydrostatic inspection test pressures for plain end and threaded and coupled pipe are specified. Hydrostatic pressure shall be maintained for not less than 5 seconds for all sizes of seamless and electric-resistance-weld pipe.

Mechanical Tests Specified

Tensile Test — Transverse required on ERW for NPS 8 and larger.

Degree of Bend

Diameter of Mandrel

For Normal A53 Uses

90

12 x nom dia. of pipe

For Close Coiling

180

8 x nom dia. of pipe

Flattening Test — NPS 2 and larger XM and lighter walls.

Lengths

Standard Weight

Single Random — 16′ – 22′. 5% may be jointers. If Plain Ends — 5% may be 12′ – 16′.